Pins 'seem' ok from a visual inspection. Our support vendor is involved, however because of reasons I'm getting the feeling we're now playing whack-a-mole with randomly replacing components, as opposed to actually using the results from previous tests such as moving the FPC to guide us towards a most likely culprit.
The reason I'd like to know if the PEM has 'individual' outputs / feeds to each FPC vs. a bus arrangement vai the midplane is that will hopefully prevent needlessly changing out the PEM if it's more likely the midplane, or vice-versa. Requests so far for a more detailed power architecture have been met with being sent that same (basic) document over and over; you'd think somebody, somewhere would have some more detailed insight into the power architecture of these beasts. Sam On Thu, Sep 11, 2014 at 8:34 AM, Tom Storey <t...@snnap.net> wrote: > Can you see any physical damage to any of the pins on the midplane? I > and my colleagues have come across a number of damaged sockets, bent > pins etc. > > May not be easy to do, but perhaps power cycle all of the inputs to > that PEM, and perhaps unseat and inspect for damage on the pins for it > as well. > > If not, JTAC and see what they say. I'd like to hear the outcome > though, as I work a lot with Juniper routers, this could be a useful > bit of knowledge! > > On 10 September 2014 23:36, Sam Silvester <sam.silves...@gmail.com> wrote: > > Hi Aqeel - thanks for the reply. > > > > Agree 100% - the problem is, we only seem to be getting power to FPC0 > from > > one PEM... have a look below (and also note that FPC1 is fine, as are the > > rest of the FPCs). > > > > The question is - are we looking at a PEM fault here, or a midplane > fault? > > As per previous discussion, the FPC itself seems fine, as moving it to > > another slot resolves the issue. Putting another card into slot 0 yields > > the same result as below. > > > > PEM 0 status: > > State Online > > Temperature 32 degrees C / 89 degrees F > > DC Input: OK > > Voltage(V) Current(A) Power(W) Load(%) > > INPUT 0 54.750 4.312 236 9 > > INPUT 1 54.500 6.000 327 13 > > INPUT 2 54.625 11.750 641 26 > > INPUT 3 54.750 6.125 335 13 > > INPUT 4 54.250 10.500 569 23 > > INPUT 5 54.500 6.062 330 13 > > DC Output Voltage(V) Current(A) Power(W) Load(%) > > FPC 0 55.062 8.625 474 31 > > FPC 1 55.250 4.062 224 14 > > > > <...snip...> > > > > PEM 1 status: > > State Online > > Temperature 30 degrees C / 86 degrees F > > DC Input: OK > > Voltage(V) Current(A) Power(W) Load(%) > > INPUT 0 54.500 3.250 177 7 > > INPUT 1 54.625 3.375 184 7 > > INPUT 2 54.500 12.437 677 28 > > INPUT 3 54.500 5.125 279 11 > > INPUT 4 54.625 12.062 658 27 > > INPUT 5 54.375 2.750 149 6 > > DC Output Voltage(V) Current(A) Power(W) Load(%) > > FPC 0 0.000 0.000 0 0 > > FPC 1 55.125 4.500 248 16 > > > > <...snip...> > > > > > > > > On Wed, Sep 10, 2014 at 8:48 PM, aqeel ahmed <aqee...@yahoo.com> wrote: > > > >> Hi > >> > >> Though aimed for redundancy If system has both power supplies installed > >> then it will automatically load balance and in case one power supply > goes > >> down then whole system will be on single power supply left working. > >> > >> For further details you can refer to following juniper document. > >> > >> > >> > http://www.juniper.net/techpubs/en_US/release-independent/junos/information-products/topic-collections/hardware/t-series/t4000/hwguide/t4000-hwguide.pdf > >> > >> Regards > >> > >> > >> > >> On Wednesday, September 10, 2014 5:16 AM, Sam Silvester < > >> sam.silves...@gmail.com> wrote: > >> > >> > >> Howdy, > >> > >> Can anybody shed any light on how the PEMs on a T4000 actually > distribute > >> power to each FPC slot? > >> > >> Have the case of a single FPC slot that is showing power being received > >> from only one of the PEMs, whilst all the other FPC slots are load > sharing > >> as expected. > >> > >> Replacing the FPC shows the same issue, so we're pretty happy that it's > >> "slot specific". > >> > >> What I'm curious about is if the midplane has individual 'traces' (for > lack > >> of a better term) for supplying power to each FPC from the two PEMs, or > if > >> there is a common bus shared between all the FPCs from each PEM. The > reason > >> I ask is if the PEM only has a single connection to the midplane, > replacing > >> it seems pointless and instead it looks like we're better off replacing > the > >> midplane. If the PEM has individual outputs to each slot, then replacing > >> the PEM seems like a reasonable approach. > >> > >> I've been pointed at the following document ( > >> > >> > http://www.juniper.net/documentation/en_US/release-independent/junos/topics/concept/power-supply-t4000-description.html > >> ) > >> which is very light-on in terms of detail. Does anybody know if there > is a > >> more detailed document available (or even internally?) that we can ask > >> about? > >> > >> Thanks! > >> _______________________________________________ > >> juniper-nsp mailing list juniper-nsp@puck.nether.net > >> https://puck.nether.net/mailman/listinfo/juniper-nsp > >> > >> > >> > > _______________________________________________ > > juniper-nsp mailing list juniper-nsp@puck.nether.net > > https://puck.nether.net/mailman/listinfo/juniper-nsp > _______________________________________________ juniper-nsp mailing list juniper-nsp@puck.nether.net https://puck.nether.net/mailman/listinfo/juniper-nsp
